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Isolated third-nerve palsy associated with frontal sinus mucocele
S J Ehrenpreis1, J F Biedlingmaier
1Friedenwald Eye Institute of Maryland General Hospital, Baltimore, USA.
Summary
Frontal sinus mucoceles can rarely cause isolated pupil-sparing third-nerve palsies. This case highlights mucoceles as an unusual cause of oculomotor nerve abnormalities and orbital symptoms.
Area of Science:
- Ophthalmology
- Neurology
- Otorhinolaryngology
Background:
- Isolated third-nerve palsy (oculomotor nerve palsy) typically suggests serious underlying pathology such as aneurysms, vascular disease, trauma, or neoplasms.
- Sinus mucoceles are rare cystic masses that can cause orbital symptoms, but cranial nerve involvement is uncommon.
Observation:
- This report details an unusual case presenting with an isolated, pupil-sparing third-nerve palsy.
- The palsy was the initial presenting sign, leading to the diagnosis of a frontal sinus mucocele.
Findings:
- The study identifies a rare instance where a frontal sinus mucocele manifested as an isolated, pupil-sparing third-nerve palsy.
- This finding expands the spectrum of known orbital complications associated with sinus mucoceles.
Implications:
- Highlights the importance of considering sinus mucoceles in the differential diagnosis of isolated third-nerve palsies, even without typical sinus symptoms.
- Emphasizes the need for a comprehensive evaluation, including imaging, to identify non-neoplastic and non-vascular causes of cranial nerve palsies.
- Suggests that prompt diagnosis and management of sinus mucoceles can prevent further neurological or visual complications.